SOURCE

function writeDocument(variable) {
    document.write(variable + "<br/>");
} 

writeDocument("----定义一个时间对象--------------------------------");
var oTaday=new Date();
writeDocument(oTaday);

writeDocument("----获取年、月、日、时、分、秒--------------------------------");
writeDocument("年： "+oTaday.getFullYear());
writeDocument("月： "+(oTaday.getMonth()+1));
writeDocument("日： "+oTaday.getDate());
writeDocument("时： "+oTaday.getHours());
writeDocument("分： "+oTaday.getMinutes());
writeDocument("秒： "+oTaday.getSeconds());

writeDocument("----设置时间对象的年、月、日、时分秒（2019-6-1 11：30：58 888）--------------------------------");
var oMyBirthday = new Date();
oMyBirthday.setFullYear(2019);
oMyBirthday.setMonth(5);
oMyBirthday.setDate(1);
oMyBirthday.setHours(11);
oMyBirthday.setMinutes(30);
oMyBirthday.setSeconds(58,888);
writeDocument(oMyBirthday);

writeDocument("----获取星期几-------------");
writeDocument("今天是星期" +oTaday.getDay());

var week=["星期天","星期一","星期二","星期三","星期四","星期五","星期六"];
writeDocument("今天是"+ week[oTaday.getDay()]);

writeDocument("请你打印'今天是2022年3月22日 星期二 8:55 ' ----------------"); 
var oPrintDate= new Date(2022,3,22,8,55);
document.write(oPrintDate.getFullYear()+"年"+(oPrintDate.getMonth()+1)+"月"+oPrintDate.getDate()+"日");
document.write(" "+week[oPrintDate.getDay()]);
document.write(oPrintDate.getHours()+":"+oPrintDate.getMinutes());